A vibrating screen feed conveying apparatus for conveying and separating sticky “moisture laden bulk solids” which are sticky and wet flowing onto a vibrating screening feeder and into a hopper. The apparatus includes a bed on which material is conveyed, a longitudinal counterbalance supported on a plurality of isolation springs, a plurality of inclined drive springs extending between the bed and the longitudinal counterbalance, and a plurality of stabilizers for controlling movement of the drive springs along their central axes. A plurality of vibratory motors, each having rotatable eccentric weights are attached to the rear end of the longitudinal counterbalance. The eccentric weights rotate in phase with one another to vibrate the bed at a vibration frequency.

A vibrating screen feed conveying apparatus for conveying and separating sticky “moisture laden bulk solids” which are sticky and wet flowing onto a vibrating screening feeder and into a hopper. The apparatus includes a bed on which material is conveyed, a longitudinal counterbalance supported on a plurality of isolation springs, a plurality of inclined drive springs extending between the bed and the longitudinal counterbalance, and a plurality of stabilizers for controlling movement of the drive springs along their central axes. A plurality of vibratory motors, each having rotatable eccentric weights are attached to the rear end of the longitudinal counterbalance. The eccentric weights rotate in phase with one another to vibrate the bed at a vibration frequency.

A vibrating screen feed conveying apparatus for conveying and separating sticky “moisture laden bulk solids” which are sticky and wet flowing onto a vibrating screening feeder and into a hopper. The apparatus includes a bed on which material is conveyed, a longitudinal counterbalance supported on a plurality of isolation springs, a plurality of inclined drive springs extending between the bed and the longitudinal counterbalance, and a plurality of stabilizers for controlling movement of the drive springs along their central axes. A plurality of vibratory motors, each having rotatable eccentric weights are attached to the rear end of the longitudinal counterbalance. The eccentric weights rotate in phase with one another to vibrate the bed at a vibration frequency.

A wheel assembly for a shaft of a screening machine includes a disc and a first and a second weight unit. The first and the second weight units are arranged such that the disc is in equilibrium along a longitudinal axis passing through the center of the disc and the longitudinal axis is perpendicular to a diametrical extension of the disc. A screening machine having the wheel assembly is also provided.

Vibratory conveyors, vibratory conveyor systems, and related methods are disclosed. An exemplary vibratory conveyor includes a support frame; a pan configured to receive a conveyed material, the pan mounted for cyclic movement relative to the support frame, the pan having a pan axis generally aligned with a conveying direction; and at least two linear servomotors operatively coupled to move the pan relative to the support frame, the at least two linear servomotors comprising a first linear servomotor and a second linear servomotor. The first linear servomotor defines a first linear servomotor actuating axis, the second linear servomotor defines a second linear servomotor actuating axis, and the first linear servomotor actuating axis is oriented obliquely relative to the second linear servomotor actuating axis.

Vibratory conveyors, vibratory conveyor systems, and related methods are disclosed. An exemplary vibratory conveyor includes a support frame; a pan configured to receive a conveyed material, the pan mounted for cyclic movement relative to the support frame, the pan having a pan axis generally aligned with a conveying direction; and at least two linear servomotors operatively coupled to move the pan relative to the support frame, the at least two linear servomotors comprising a first linear servomotor and a second linear servomotor. The first linear servomotor defines a first linear servomotor actuating axis, the second linear servomotor defines a second linear servomotor actuating axis, and the first linear servomotor actuating axis is oriented obliquely relative to the second linear servomotor actuating axis.

The vibrating screen have a screen deck, two sidewalls and a mechanical vibrator comprising two shafts, rotating at the same rotation and in opposite directions, each one of the end portions of each shaft carrying an eccentric weight and being supported on bearings which are supported in the sidewalls of the vibrating screen. The shafts have their end portions, adjacent to each other, supported on bearings mounted to a same bearing case fixed to beams, transversal and having opposite ends fixed to the sidewalls of the vibrating screen. Each end portion of a shaft carries an eccentric weight with a total mass different from that one of the eccentric weights of the end portions of the other shaft, said shafts rotating in determined phases, defining the inclination of the major axis of an elliptical movement imparted to the screen deck.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

Tensioner systems, methods and apparatus are described for tensioning drive belts of vibratory screens.